城市免费核酸检测采样点空间可达性研究  

Study on Spatial Accessibility of Urban Free Nucleic Acid Test Sites

作　　者：季霞[1] 李涛[1] 密长林 蔡振峰 JI Xia;LI Tao;MI Changlin;CAI Zhengfeng(Institute of Surveying and Mapping,Linyi Land and Resources Bureau,Linyi 276002,China;Natural Resources Development Service Center of Linyi,Linyi 276002,China;Natural Resources Bureau of Lanshan District,Linyi 276002,China)

机构地区：[1]临沂市国土资源局测绘院,山东临沂276002 [2]临沂市自然资源开发服务中心,山东临沂276002 [3]临沂市兰山区自然资源局,山东临沂276002

出　　处：《地理空间信息》2022年第12期47-52,共6页Geospatial Information

基　　金：国家自然科学基金资助项目(42071217)。

摘　　要：提出一种基于增强型两步移动搜索法算法的城市核酸采样点空间可达性评估模型,模型将研究区格网化为人口需求点,使用高德API的步行规划接口估算人口格网单元到达核酸采样点的时间成本,对研究区核酸采样点的空间可达性进行评估。以武汉市长江以北的中心城区为实验区,结果表明,研究区边缘地带的空间可达性最低,汉阳区中心、硚口区西北部、江岸区北部以及东北地点的空间可达性最高,核酸采样点的空间可达性受人口密度、最短步行时间以及采样点服务时长的共同影响,并据此提出了提高研究区核酸采样点空间可达性的建议。In this paper,we proposed a model based on the enhanced two-step floating catchment area(2SFCA)to evaluate the spatial accessibility of urban nucleic acid test sites.Taking the central urban area north of the Yangtze River in Wuhan as the study area,we transformed the grid of study area into population demand points,and estimated the travel time between population and testing sites from an online map API.The results show that the spatial accessibility across the study area is unbalanced,with relatively high spatial accessibility in the center of Hanyang District,the northwest area of Qiaokou District,the north and northeast area of Jiang’an District,and relatively low spatial accessibility in the periphery and boundary of study area.Meanwhile,the spatial accessibility is strongly affected by population density,travel time and service time of nucleic acid test sites.Then,we put forward some suggestions to improve the overall spatial access of nucleic acid test sites.

关 键 词：空间可达性 两步移动搜索法 核酸采样点 

分 类 号：P208[天文地球—地图制图学与地理信息工程]